A meta-analysis of critical causes of project delay using Spearman’s rank and relative importance index integrated approach

This meta-analysis has examined the past ten years’ studies concerning causes of construction project delay. It aims to update subject area and investigate critical delay in three different conditions external environment. The data from 50 have been analyzed synthesized determine top Relative Importance Index (RII) technique was applied rank causes; subsequently, Spearman’s correlation coefficient calculated evaluate causes. review findings indicate substantial differences between defined situations. developed countries root project’s internal leading delays developing are task While with various constraints high risk, general environment a impact alongside on time overrun project. Moreover, this summarized categorized best available propose systematic approach identifying bridge existing knowledge gap.